arch/powerpc/cpu/mpc83xx/ecc.c

   1 /*
   2  * Copyright (C) 2007 Freescale Semiconductor, Inc.
   3  *
   4  * Dave Liu <daveliu@freescale.com>
   5  * based on the contribution of Marian Balakowicz <m8@semihalf.com>
   6  *
   7  * See file CREDITS for list of people who contributed to this
   8  * project.
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License as
  12  * published by the Free Software Foundation; either version 2 of
  13  * the License, or (at your option) any later version.
  14  */
  15
  16 #include <common.h>
  17 #include <mpc83xx.h>
  18 #include <command.h>
  19
  20 #if defined(CONFIG_DDR_ECC) && defined(CONFIG_DDR_ECC_CMD)
  21 void ecc_print_status(void)
  22 {
  23         volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
  24         volatile ddr83xx_t *ddr = &immap->ddr;
  25
  26         printf("\nECC mode: %s\n\n",
  27                (ddr->sdram_cfg & SDRAM_CFG_ECC_EN) ? "ON" : "OFF");
  28
  29         /* Interrupts */
  30         printf("Memory Error Interrupt Enable:\n");
  31         printf("  Multiple-Bit Error Interrupt Enable: %d\n",
  32                (ddr->err_int_en & ECC_ERR_INT_EN_MBEE) ? 1 : 0);
  33         printf("  Single-Bit Error Interrupt Enable: %d\n",
  34                (ddr->err_int_en & ECC_ERR_INT_EN_SBEE) ? 1 : 0);
  35         printf("  Memory Select Error Interrupt Enable: %d\n\n",
  36                (ddr->err_int_en & ECC_ERR_INT_EN_MSEE) ? 1 : 0);
  37
  38         /* Error disable */
  39         printf("Memory Error Disable:\n");
  40         printf("  Multiple-Bit Error Disable: %d\n",
  41                (ddr->err_disable & ECC_ERROR_DISABLE_MBED) ? 1 : 0);
  42         printf("  Sinle-Bit Error Disable: %d\n",
  43                (ddr->err_disable & ECC_ERROR_DISABLE_SBED) ? 1 : 0);
  44         printf("  Memory Select Error Disable: %d\n\n",
  45                (ddr->err_disable & ECC_ERROR_DISABLE_MSED) ? 1 : 0);
  46
  47         /* Error injection */
  48         printf("Memory Data Path Error Injection Mask High/Low: %08x %08x\n",
  49                ddr->data_err_inject_hi, ddr->data_err_inject_lo);
  50
  51         printf("Memory Data Path Error Injection Mask ECC:\n");
  52         printf("  ECC Mirror Byte: %d\n",
  53                (ddr->ecc_err_inject & ECC_ERR_INJECT_EMB) ? 1 : 0);
  54         printf("  ECC Injection Enable: %d\n",
  55                (ddr->ecc_err_inject & ECC_ERR_INJECT_EIEN) ? 1 : 0);
  56         printf("  ECC Error Injection Mask: 0x%02x\n\n",
  57                ddr->ecc_err_inject & ECC_ERR_INJECT_EEIM);
  58
  59         /* SBE counter/threshold */
  60         printf("Memory Single-Bit Error Management (0..255):\n");
  61         printf("  Single-Bit Error Threshold: %d\n",
  62                (ddr->err_sbe & ECC_ERROR_MAN_SBET) >> ECC_ERROR_MAN_SBET_SHIFT);
  63         printf("  Single-Bit Error Counter: %d\n\n",
  64                (ddr->err_sbe & ECC_ERROR_MAN_SBEC) >> ECC_ERROR_MAN_SBEC_SHIFT);
  65
  66         /* Error detect */
  67         printf("Memory Error Detect:\n");
  68         printf("  Multiple Memory Errors: %d\n",
  69                (ddr->err_detect & ECC_ERROR_DETECT_MME) ? 1 : 0);
  70         printf("  Multiple-Bit Error: %d\n",
  71                (ddr->err_detect & ECC_ERROR_DETECT_MBE) ? 1 : 0);
  72         printf("  Single-Bit Error: %d\n",
  73                (ddr->err_detect & ECC_ERROR_DETECT_SBE) ? 1 : 0);
  74         printf("  Memory Select Error: %d\n\n",
  75                (ddr->err_detect & ECC_ERROR_DETECT_MSE) ? 1 : 0);
  76
  77         /* Capture data */
  78         printf("Memory Error Address Capture: 0x%08x\n", ddr->capture_address);
  79         printf("Memory Data Path Read Capture High/Low: %08x %08x\n",
  80                ddr->capture_data_hi, ddr->capture_data_lo);
  81         printf("Memory Data Path Read Capture ECC: 0x%02x\n\n",
  82                ddr->capture_ecc & CAPTURE_ECC_ECE);
  83
  84         printf("Memory Error Attributes Capture:\n");
  85         printf(" Data Beat Number: %d\n",
  86                (ddr->capture_attributes & ECC_CAPT_ATTR_BNUM) >>
  87                ECC_CAPT_ATTR_BNUM_SHIFT);
  88         printf("  Transaction Size: %d\n",
  89                (ddr->capture_attributes & ECC_CAPT_ATTR_TSIZ) >>
  90                ECC_CAPT_ATTR_TSIZ_SHIFT);
  91         printf("  Transaction Source: %d\n",
  92                (ddr->capture_attributes & ECC_CAPT_ATTR_TSRC) >>
  93                ECC_CAPT_ATTR_TSRC_SHIFT);
  94         printf("  Transaction Type: %d\n",
  95                (ddr->capture_attributes & ECC_CAPT_ATTR_TTYP) >>
  96                ECC_CAPT_ATTR_TTYP_SHIFT);
  97         printf("  Error Information Valid: %d\n\n",
  98                ddr->capture_attributes & ECC_CAPT_ATTR_VLD);
  99 }
 100
 101 int do_ecc(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
 102 {
 103         volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
 104         volatile ddr83xx_t *ddr = &immap->ddr;
 105         volatile u32 val;
 106         u64 *addr;
 107         u32 count;
 108         register u64 *i;
 109         u32 ret[2];
 110         u32 pattern[2];
 111         u32 writeback[2];
 112
 113         /* The pattern is written into memory to generate error */
 114         pattern[0] = 0xfedcba98UL;
 115         pattern[1] = 0x76543210UL;
 116
 117         /* After injecting error, re-initialize the memory with the value */
 118         writeback[0] = 0x01234567UL;
 119         writeback[1] = 0x89abcdefUL;
 120
 121         if (argc > 4)
 122                 return cmd_usage(cmdtp);
 123
 124         if (argc == 2) {
 125                 if (strcmp(argv[1], "status") == 0) {
 126                         ecc_print_status();
 127                         return 0;
 128                 } else if (strcmp(argv[1], "captureclear") == 0) {
 129                         ddr->capture_address = 0;
 130                         ddr->capture_data_hi = 0;
 131                         ddr->capture_data_lo = 0;
 132                         ddr->capture_ecc = 0;
 133                         ddr->capture_attributes = 0;
 134                         return 0;
 135                 }
 136         }
 137         if (argc == 3) {
 138                 if (strcmp(argv[1], "sbecnt") == 0) {
 139                         val = simple_strtoul(argv[2], NULL, 10);
 140                         if (val > 255) {
 141                                 printf("Incorrect Counter value, "
 142                                        "should be 0..255\n");
 143                                 return 1;
 144                         }
 145
 146                         val = (val << ECC_ERROR_MAN_SBEC_SHIFT);
 147                         val |= (ddr->err_sbe & ECC_ERROR_MAN_SBET);
 148
 149                         ddr->err_sbe = val;
 150                         return 0;
 151                 } else if (strcmp(argv[1], "sbethr") == 0) {
 152                         val = simple_strtoul(argv[2], NULL, 10);
 153                         if (val > 255) {
 154                                 printf("Incorrect Counter value, "
 155                                        "should be 0..255\n");
 156                                 return 1;
 157                         }
 158
 159                         val = (val << ECC_ERROR_MAN_SBET_SHIFT);
 160                         val |= (ddr->err_sbe & ECC_ERROR_MAN_SBEC);
 161
 162                         ddr->err_sbe = val;
 163                         return 0;
 164                 } else if (strcmp(argv[1], "errdisable") == 0) {
 165                         val = ddr->err_disable;
 166
 167                         if (strcmp(argv[2], "+sbe") == 0) {
 168                                 val |= ECC_ERROR_DISABLE_SBED;
 169                         } else if (strcmp(argv[2], "+mbe") == 0) {
 170                                 val |= ECC_ERROR_DISABLE_MBED;
 171                         } else if (strcmp(argv[2], "+mse") == 0) {
 172                                 val |= ECC_ERROR_DISABLE_MSED;
 173                         } else if (strcmp(argv[2], "+all") == 0) {
 174                                 val |= (ECC_ERROR_DISABLE_SBED |
 175                                         ECC_ERROR_DISABLE_MBED |
 176                                         ECC_ERROR_DISABLE_MSED);
 177                         } else if (strcmp(argv[2], "-sbe") == 0) {
 178                                 val &= ~ECC_ERROR_DISABLE_SBED;
 179                         } else if (strcmp(argv[2], "-mbe") == 0) {
 180                                 val &= ~ECC_ERROR_DISABLE_MBED;
 181                         } else if (strcmp(argv[2], "-mse") == 0) {
 182                                 val &= ~ECC_ERROR_DISABLE_MSED;
 183                         } else if (strcmp(argv[2], "-all") == 0) {
 184                                 val &= ~(ECC_ERROR_DISABLE_SBED |
 185                                          ECC_ERROR_DISABLE_MBED |
 186                                          ECC_ERROR_DISABLE_MSED);
 187                         } else {
 188                                 printf("Incorrect err_disable field\n");
 189                                 return 1;
 190                         }
 191
 192                         ddr->err_disable = val;
 193                         __asm__ __volatile__("sync");
 194                         __asm__ __volatile__("isync");
 195                         return 0;
 196                 } else if (strcmp(argv[1], "errdetectclr") == 0) {
 197                         val = ddr->err_detect;
 198
 199                         if (strcmp(argv[2], "mme") == 0) {
 200                                 val |= ECC_ERROR_DETECT_MME;
 201                         } else if (strcmp(argv[2], "sbe") == 0) {
 202                                 val |= ECC_ERROR_DETECT_SBE;
 203                         } else if (strcmp(argv[2], "mbe") == 0) {
 204                                 val |= ECC_ERROR_DETECT_MBE;
 205                         } else if (strcmp(argv[2], "mse") == 0) {
 206                                 val |= ECC_ERROR_DETECT_MSE;
 207                         } else if (strcmp(argv[2], "all") == 0) {
 208                                 val |= (ECC_ERROR_DETECT_MME |
 209                                         ECC_ERROR_DETECT_MBE |
 210                                         ECC_ERROR_DETECT_SBE |
 211                                         ECC_ERROR_DETECT_MSE);
 212                         } else {
 213                                 printf("Incorrect err_detect field\n");
 214                                 return 1;
 215                         }
 216
 217                         ddr->err_detect = val;
 218                         return 0;
 219                 } else if (strcmp(argv[1], "injectdatahi") == 0) {
 220                         val = simple_strtoul(argv[2], NULL, 16);
 221
 222                         ddr->data_err_inject_hi = val;
 223                         return 0;
 224                 } else if (strcmp(argv[1], "injectdatalo") == 0) {
 225                         val = simple_strtoul(argv[2], NULL, 16);
 226
 227                         ddr->data_err_inject_lo = val;
 228                         return 0;
 229                 } else if (strcmp(argv[1], "injectecc") == 0) {
 230                         val = simple_strtoul(argv[2], NULL, 16);
 231                         if (val > 0xff) {
 232                                 printf("Incorrect ECC inject mask, "
 233                                        "should be 0x00..0xff\n");
 234                                 return 1;
 235                         }
 236                         val |= (ddr->ecc_err_inject & ~ECC_ERR_INJECT_EEIM);
 237
 238                         ddr->ecc_err_inject = val;
 239                         return 0;
 240                 } else if (strcmp(argv[1], "inject") == 0) {
 241                         val = ddr->ecc_err_inject;
 242
 243                         if (strcmp(argv[2], "en") == 0)
 244                                 val |= ECC_ERR_INJECT_EIEN;
 245                         else if (strcmp(argv[2], "dis") == 0)
 246                                 val &= ~ECC_ERR_INJECT_EIEN;
 247                         else
 248                                 printf("Incorrect command\n");
 249
 250                         ddr->ecc_err_inject = val;
 251                         __asm__ __volatile__("sync");
 252                         __asm__ __volatile__("isync");
 253                         return 0;
 254                 } else if (strcmp(argv[1], "mirror") == 0) {
 255                         val = ddr->ecc_err_inject;
 256
 257                         if (strcmp(argv[2], "en") == 0)
 258                                 val |= ECC_ERR_INJECT_EMB;
 259                         else if (strcmp(argv[2], "dis") == 0)
 260                                 val &= ~ECC_ERR_INJECT_EMB;
 261                         else
 262                                 printf("Incorrect command\n");
 263
 264                         ddr->ecc_err_inject = val;
 265                         return 0;
 266                 }
 267         }
 268         if (argc == 4) {
 269                 if (strcmp(argv[1], "testdw") == 0) {
 270                         addr = (u64 *) simple_strtoul(argv[2], NULL, 16);
 271                         count = simple_strtoul(argv[3], NULL, 16);
 272
 273                         if ((u32) addr % 8) {
 274                                 printf("Address not alligned on "
 275                                        "double word boundary\n");
 276                                 return 1;
 277                         }
 278                         disable_interrupts();
 279
 280                         for (i = addr; i < addr + count; i++) {
 281
 282                                 /* enable injects */
 283                                 ddr->ecc_err_inject |= ECC_ERR_INJECT_EIEN;
 284                                 __asm__ __volatile__("sync");
 285                                 __asm__ __volatile__("isync");
 286
 287                                 /* write memory location injecting errors */
 288                                 ppcDWstore((u32 *) i, pattern);
 289                                 __asm__ __volatile__("sync");
 290
 291                                 /* disable injects */
 292                                 ddr->ecc_err_inject &= ~ECC_ERR_INJECT_EIEN;
 293                                 __asm__ __volatile__("sync");
 294                                 __asm__ __volatile__("isync");
 295
 296                                 /* read data, this generates ECC error */
 297                                 ppcDWload((u32 *) i, ret);
 298                                 __asm__ __volatile__("sync");
 299
 300                                 /* re-initialize memory, double word write the location again,
 301                                  * generates new ECC code this time */
 302                                 ppcDWstore((u32 *) i, writeback);
 303                                 __asm__ __volatile__("sync");
 304                         }
 305                         enable_interrupts();
 306                         return 0;
 307                 }
 308                 if (strcmp(argv[1], "testword") == 0) {
 309                         addr = (u64 *) simple_strtoul(argv[2], NULL, 16);
 310                         count = simple_strtoul(argv[3], NULL, 16);
 311
 312                         if ((u32) addr % 8) {
 313                                 printf("Address not alligned on "
 314                                        "double word boundary\n");
 315                                 return 1;
 316                         }
 317                         disable_interrupts();
 318
 319                         for (i = addr; i < addr + count; i++) {
 320
 321                                 /* enable injects */
 322                                 ddr->ecc_err_inject |= ECC_ERR_INJECT_EIEN;
 323                                 __asm__ __volatile__("sync");
 324                                 __asm__ __volatile__("isync");
 325
 326                                 /* write memory location injecting errors */
 327                                 *(u32 *) i = 0xfedcba98UL;
 328                                 __asm__ __volatile__("sync");
 329
 330                                 /* sub double word write,
 331                                  * bus will read-modify-write,
 332                                  * generates ECC error */
 333                                 *((u32 *) i + 1) = 0x76543210UL;
 334                                 __asm__ __volatile__("sync");
 335
 336                                 /* disable injects */
 337                                 ddr->ecc_err_inject &= ~ECC_ERR_INJECT_EIEN;
 338                                 __asm__ __volatile__("sync");
 339                                 __asm__ __volatile__("isync");
 340
 341                                 /* re-initialize memory,
 342                                  * double word write the location again,
 343                                  * generates new ECC code this time */
 344                                 ppcDWstore((u32 *) i, writeback);
 345                                 __asm__ __volatile__("sync");
 346                         }
 347                         enable_interrupts();
 348                         return 0;
 349                 }
 350         }
 351         return cmd_usage(cmdtp);
 352 }
 353
 354 U_BOOT_CMD(ecc, 4, 0, do_ecc,
 355            "support for DDR ECC features",
 356            "status              - print out status info\n"
 357            "ecc captureclear        - clear capture regs data\n"
 358            "ecc sbecnt <val>        - set Single-Bit Error counter\n"
 359            "ecc sbethr <val>        - set Single-Bit Threshold\n"
 360            "ecc errdisable <flag>   - clear/set disable Memory Error Disable, flag:\n"
 361            "  [-|+]sbe - Single-Bit Error\n"
 362            "  [-|+]mbe - Multiple-Bit Error\n"
 363            "  [-|+]mse - Memory Select Error\n"
 364            "  [-|+]all - all errors\n"
 365            "ecc errdetectclr <flag> - clear Memory Error Detect, flag:\n"
 366            "  mme - Multiple Memory Errors\n"
 367            "  sbe - Single-Bit Error\n"
 368            "  mbe - Multiple-Bit Error\n"
 369            "  mse - Memory Select Error\n"
 370            "  all - all errors\n"
 371            "ecc injectdatahi <hi>  - set Memory Data Path Error Injection Mask High\n"
 372            "ecc injectdatalo <lo>  - set Memory Data Path Error Injection Mask Low\n"
 373            "ecc injectecc <ecc>    - set ECC Error Injection Mask\n"
 374            "ecc inject <en|dis>    - enable/disable error injection\n"
 375            "ecc mirror <en|dis>    - enable/disable mirror byte\n"
 376            "ecc testdw <addr> <cnt>  - test mem region with double word access:\n"
 377            "  - enables injects\n"
 378            "  - writes pattern injecting errors with double word access\n"
 379            "  - disables injects\n"
 380            "  - reads pattern back with double word access, generates error\n"
 381            "  - re-inits memory\n"
 382            "ecc testword <addr> <cnt>  - test mem region with word access:\n"
 383            "  - enables injects\n"
 384            "  - writes pattern injecting errors with word access\n"
 385            "  - writes pattern with word access, generates error\n"
 386            "  - disables injects\n" "  - re-inits memory");
 387 #endif